:Product: documentation at http://www.sidc.be/products/bul
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# SIDC Weekly bulletin on Solar and Geomagnetic activity #
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WEEK 373 from 2008 Feb 18
SOLAR ACTIVITY
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No flares occured this week. The X-ray radiation output was even
below the measurement level of GOES10.
A small equatorial hole passed the central meridian on Feb 17.
GEOMAGNETIC ACTIVITY
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The equatorial hole caused minor disturbances on Feb 18.
Only period with Kp=4 was measured. Apart from this period,
the estimated Kp index reached a maximum value of only 3.
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DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2008 Feb 18 000 000 71 017 A0.0 0 0
2008 Feb 19 000 000 72 014 A0.0 0 0
2008 Feb 20 000 000 71 006 A0.0 0 0
2008 Feb 21 /// 000 72 008 A0.0 0 0
2008 Feb 22 000 000 72 003 A0.0 0 0
2008 Feb 23 000 000 72 007 A0.0 0 0
2008 Feb 24 /// 000 71 006 A0.0 0 0
# RC : Sunspot index (Wolf Number) from Catania Observatory (Italy)
# EISN : Estimated International Sunspot Number
# 10cm : 10.7 cm radioflux (DRAO, Canada)
# Ak : Ak Index Wingst (Germany)
# BKG : Background GOES X-ray level (NOAA, USA)
# M,X : Number of X-ray flares in M and X class, see below (NOAA, USA)
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NOTICEABLE EVENTS
DAY BEGIN MAX END LOC XRAY OP TENCM TYPE Cat NOAA
NOTE
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# Solar Influences Data analysis Center - RWC Belgium #
# Royal Observatory of Belgium #
# Fax : 32 (0) 2 373 0 224 #
# Tel.: 32 (0) 2 373 0 491 #
